Marine One carrying US President Barack Obama comes in to land at the Wall Street Landing Zone in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
Marine One carrying US President Barack Obama comes in to land at the Wall Street Landing Zone in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
Scott Davis (L) and U.S. President Barack Obama participate in a roundtable discussion with young people before speaking at the launch of My Brother's Keeper Alliance at Lehman College May 4, 2015 in the Bronx borough of New York City. (Credit: Susan Watts-Pool/Getty Images)
President Obama In NYC, May 4, 2015
(L to R) Malachi Hernandez, Scott Davis and U.S. President Barack Obama participate in a roundtable discussion with young people before speaking at the launch of My Brother's Keeper Alliance at Lehman College May 4, 2015 in the Bronx borough of New York City. (Credit: Susan Watts-Pool/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama (C) participates in a roundtable discussion with young people before speaking at the launch of My Brother's Keeper Alliance at Lehman College May 4, 2015 in the Bronx borough of New York City. (Credit: Susan Watts-Pool/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama participates in a roundtable discussion with young people at an event at Lehman College launching the My Brothers Keeper Alliance, a new non-profit organization, in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama participates in a roundtable discussion with young people at an event at Lehman College launching the My Brothers Keeper Alliance, a new non-profit organization, in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama poses with youths after speaking at an event at Lehman College launching the My Brothers Keeper Alliance, a new non-profit organization, in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama speaks during the launch of a nonprofit group, My Brother's Keeper Alliance at Lehman College in the Bronx borough on May 4, 2015 in New York City. (Credit: Spencer Platt/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama speaks during the launch of a nonprofit group, My Brother's Keeper Alliance at Lehman College in the Bronx borough on May 4, 2015 in New York City. (Credit: Spencer Platt/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama speaks at an event at Lehman College launching the My Brothers Keeper Alliance, a new non-profit organization, in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama tapes an appearance on the "Late Show with David Letterman" in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama tapes an appearance on the "Late Show with David Letterman" in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama tapes an appearance on the "Late Show with David Letterman" in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)
President Obama In NYC, May 4, 2015
U.S. President Barack Obama tapes an appearance on the "Late Show with David Letterman" in New York on May 4, 2015. (Credit: NICHOLAS KAMM/AFP/Getty Images)